/*
 *  ppui/osinterface/posix/PPPath_POSIX.cpp
 *
 *  Copyright 2009 Peter Barth
 *
 *  This file is part of Milkytracker.
 *
 *  Milkytracker is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Milkytracker is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Milkytracker.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 *  PPPath_POSIX.cpp
 *  MilkyTracker
 *
 *  Created by Peter Barth on 10.03.06.
 *
 */

#include "PPPath_POSIX.h"
#include <sys/stat.h>
#include <limits.h>

#ifdef __PSP__
// Needed for PATH_MAX
    #include <sys/syslimits.h>
#endif

#ifdef __AMIGA__
    #define PATH_MAX 1024
#endif

#define PPMAX_DIR_PATH PATH_MAX

void PPPathEntry_POSIX::create(const PPSystemString& path, const PPSystemString& name)
{
    this->name = name;
    PPSystemString fullPath = path;

    fullPath.append(name);

    struct stat file_status;

    if (::stat(fullPath, &file_status) == 0)
    {
        size = file_status.st_size;

        if (S_ISDIR(file_status.st_mode))
            type = Directory;
        //if (S_ISLNK(file_status.st_mode))
        //	printf("foo.txt is a symbolic link\n");
        if (S_ISCHR(file_status.st_mode))
            type = Hidden;
        if (S_ISBLK(file_status.st_mode))
            type = Hidden;
        if (S_ISFIFO(file_status.st_mode))
            type = Hidden;
        if (S_ISSOCK(file_status.st_mode))
            type = Hidden;
        if (S_ISREG(file_status.st_mode))
            type = File;
    }
    else
    {
        /* stat() call failed and returned '-1'. */
        type = Nonexistent;
    }
}

bool PPPathEntry_POSIX::isHidden() const
{
    return PPPathEntry::isHidden() || (name.startsWith(".") && name.compareTo("..") != 0);
}

bool PPPath_POSIX::updatePath()
{
    return chdir(current) == 0;
}

PPPath_POSIX::PPPath_POSIX ()
{
    current = getCurrent();
    updatePath();
}

PPPath_POSIX::PPPath_POSIX (const PPSystemString& path) :
    current(path)
{
    updatePath();
}

const PPSystemString PPPath_POSIX::getCurrent()
{
    char cwd[PPMAX_DIR_PATH + 1];
    memset(cwd, 0, sizeof(cwd));

    getcwd(cwd, PPMAX_DIR_PATH + 1);

    PPSystemString path(cwd);

    path.ensureTrailingCharacter(getPathSeparatorAsASCII());
    return path;
}

bool PPPath_POSIX::change(const PPSystemString& path)
{
    PPSystemString old = current;
    current = path;
    current.ensureTrailingCharacter(getPathSeparatorAsASCII());
    bool res = updatePath();
    if (res)
        return true;
    current = old;
    return false;
}

bool PPPath_POSIX::stepInto(const PPSystemString& directory)
{
    PPSystemString old = current;
    current.append(directory);
    current.append(getPathSeparator());
    bool res = updatePath();
    if (res)
        return true;
    current = old;
    return false;
}

const PPPathEntry* PPPath_POSIX::getFirstEntry()
{
    dir = ::opendir(current);
    if (!dir)
    {
        return NULL;
    }

    return getNextEntry();
}

const PPPathEntry* PPPath_POSIX::getNextEntry()
{
    struct dirent* entry;
    if ((entry = ::readdir(dir)) != NULL)
    {
        PPSystemString file(entry->d_name);
        this->entry.create(current, file);

        return &this->entry;
    }

    ::closedir(dir);
    return NULL;
}

bool PPPath_POSIX::canGotoHome() const
{
    return getenv("HOME") ? true : false;
}

void PPPath_POSIX::gotoHome()
{
    char* home = getenv("HOME");
    if (home)
    {
        change(home);
        updatePath();
    }
}

bool PPPath_POSIX::canGotoRoot() const
{
    return true;
}

void PPPath_POSIX::gotoRoot()
{
    change("/");
    updatePath();
}

bool PPPath_POSIX::canGotoParent() const
{
    return true;
}

void PPPath_POSIX::gotoParent()
{
    stepInto("..");
}

char PPPath_POSIX::getPathSeparatorAsASCII() const
{
    return '/';
}

const PPSystemString PPPath_POSIX::getPathSeparator() const
{
    return PPSystemString(getPathSeparatorAsASCII());
}

bool PPPath_POSIX::fileExists(const PPSystemString& fileName) const
{
    struct stat file_status;

    if (::stat(fileName, &file_status) == 0)
    {
        return (S_ISREG(file_status.st_mode)) != 0;
    }

    return false;
}